D-Asp responses in BSC neurons in the presence of L-GluR coagonists Gly and D-Ser. (A) Average current–voltage (I–V) relationship ± SD for D-Asp currents (1 mM; 100 msec) with and without Gly added to the pressure ejection pipette (1 mM; n= 7). Inset: higher resolution view near −30 mV. (B) Example whole-cell currents in D-Asp and in D-Asp + Gly in the same cell at −30 mV. (C) Average I–V relationship ± SD for D-Asp currents with and without added D-Ser (1 mM; n= 7). (D) Example whole-cell currents in D-Asp and in D-Asp + D-Ser in the same cell at −30 mV.